General Description

Using low power CMOS process, the AS1831 is
designed for low power, high performance omnipolar
detection hall-effect application, such as cover switch, contactless switch, solid state switch and lid close
sensor etc battery operation. The hall IC integrated an
on-chip hall voltage generator for magnetic sensing, a
comparator that amplifiers the hall voltage, a Chopper
amplifier, a Schmitt trigger to provide switching
hysteresis for noise rejection, and a complementary
output. The total power consumption of AS1831 is
typically less than 2.5uA at 2.8V power supply. AS1831
is designed to respond to alternating North and South
poles. When the magnetic flux density (B) is larger than
operate point (BOP), the output will be turned on (low),
the output is held until the magnetic flux density (B) is
lower than release point (BRP), then turn off (high). The device is available in DFN1014-4L Package
and is rated over the -40°C to 85°C. The all packages
are RoHS and Green compliant.

Features

 Input Voltage Range : 2.2V to 5.5V
 Micro-power consumption ideal for battery
power applications
 Omnipolar Operation, easy to use as output
 Very high sensitivity hall sensor
 Low Power CMOS process technology
 Chopper stabilization amplifier stage
 Magnetic Sensitivity (typical)
BOP=±18Gauss, BRP=±10Gauss
 Good RF noise immunity
 No need pull-up resistor
 Small Solution Size
 RoHS & Green Compliant
 DFN1014-4L Package
 -40℃ to +85 ℃ Temperature Range

Applications

 Smart Meter
 Cover switch
 Contact-less switch